I have a card reader, with a 4gb sd card that I use as like a USB. However, I'm now suddenly unable to access the files off the drive. The computer sort of recognizes it, as a hear a sound when i plug it in, and remove it but it fails to show up in file explorer(it used to show up as removable disk F:). Also, in device manager, it also shows up but the option for browing files off the drive isn't allowed and doesn't work.
Any ideas?